teken_scs.h revision 197471
1/*- 2 * Copyright (c) 2009 Ed Schouten <ed@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD: head/sys/teken/teken_scs.h 197471 2009-09-24 20:34:44Z ed $ 27 */ 28 29static void 30teken_scs_set(teken_t *t, unsigned int g, teken_scs_t *ts) 31{ 32 33 t->t_scs[g] = ts; 34} 35 36static void 37teken_scs_switch(teken_t *t, unsigned int g) 38{ 39 40 t->t_curscs = g; 41} 42 43static void 44teken_scs_restore(teken_t *t) 45{ 46 47 t->t_scs[t->t_curscs] = t->t_saved_curscs; 48} 49 50static void 51teken_scs_save(teken_t *t) 52{ 53 54 t->t_saved_curscs = t->t_scs[t->t_curscs]; 55} 56 57static teken_char_t 58teken_scs_process(teken_t *t, teken_char_t c) 59{ 60 61 return (t->t_scs[t->t_curscs](t, c)); 62} 63 64/* Unicode points for VT100 box drawing. */ 65static const uint16_t teken_boxdrawing_unicode[31] = { 66 0x25c6, 0x2592, 0x2409, 0x240c, 0x240d, 0x240a, 0x00b0, 0x00b1, 67 0x2424, 0x240b, 0x2518, 0x2510, 0x250c, 0x2514, 0x253c, 0x23ba, 68 0x23bb, 0x2500, 0x23bc, 0x23bd, 0x251c, 0x2524, 0x2534, 0x252c, 69 0x2502, 0x2264, 0x2265, 0x03c0, 0x2260, 0x00a3, 0x00b7 70}; 71 72/* CP437 points for VT100 box drawing. */ 73static const uint8_t teken_boxdrawing_8bit[31] = { 74 0x04, 0xb1, 0x48, 0x46, 0x43, 0x4c, 0xf8, 0xf1, 75 0x4e, 0x56, 0xd9, 0xbf, 0xda, 0xc0, 0xc5, 0xc4, 76 0xc4, 0xc4, 0xc4, 0xc4, 0xc3, 0xb4, 0xc1, 0xc2, 77 0xb3, 0xf3, 0xf2, 0xe3, 0xd8, 0x9c, 0xfa, 78}; 79 80static teken_char_t 81teken_scs_special_graphics(teken_t *t, teken_char_t c) 82{ 83 84 /* Box drawing. */ 85 if (c >= '`' && c <= '~') 86 return (t->t_stateflags & TS_8BIT ? 87 teken_boxdrawing_8bit[c - '`'] : 88 teken_boxdrawing_unicode[c - '`']); 89 return (c); 90} 91 92static teken_char_t 93teken_scs_uk_national(teken_t *t, teken_char_t c) 94{ 95 96 /* Pound sign. */ 97 if (c == '#') 98 return (t->t_stateflags & TS_8BIT ? 0x9c : 0xa3); 99 return (c); 100} 101 102static teken_char_t 103teken_scs_us_ascii(teken_t *t __unused, teken_char_t c) 104{ 105 106 /* No processing. */ 107 return (c); 108} 109